I don't know what to do

So my boyfriend told me to take our son and leave then came to the apartment got him and left and I have no idea where he is and he took nothing for our son no food wipes clothes bottles just water a bit of formula and the diapers he had in his bag he says hes getting a lawyer so my moms finding one too I asked him to bring him back so we can talk like adults but he said hes not coming back